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Saturday, March 4, 2017

system.data.pdb not loaded

There are some helpful pages about this, but I find that just stopping and recompiling the app usually fixes this.
...

Bryan Valencia is a contributing editor and founder of Visual Studio Journey.  He owns and operates Software Services, a web design and hosting company in Manteca, California.

Friday, December 30, 2016

Making Transparent PNGs in C#

This bit of code shows how to make a PNG with transparency totally from scratch in code.  This code will save the image back as a file, but it could as easily be streamed back to a web request.  This is a complete console app, if you want to compile it, you'll need to add a reference to System.Drawing.



using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Imaging;

namespace TransparentPNGTests
{
    class Program
    {
        static void Main(string[] args)
        {
            using (var bmp = new System.Drawing.Bitmap(100, 100, PixelFormat.Format32bppArgb))
            using (Graphics g = Graphics.FromImage(bmp))
            using (Font f = new Font("Univers", 14f, FontStyle.Regular, GraphicsUnit.Pixel))
            {
                //set up bitmap
                g.Clear(Color.Transparent);
                g.SmoothingMode = SmoothingMode.AntiAlias;
                g.TextRenderingHint = System.Drawing.Text.TextRenderingHint.AntiAlias;

                //draw text                
                Brush b = Brushes.Black;
                Rectangle textrect = new Rectangle(5, 5, 90, 90);  
                
                //using the rectangle instead of a point is a quick way to do word wrapping on the graphic
                g.DrawString("This is a bunch of text, for testing.", f, b, textrect);

                //save from the bitmap
                g.Flush(FlushIntention.Flush);   //this seems to be wise, but unnecessary.
                bmp.Save("bmpsave.png", ImageFormat.Png);                

                //save from the image - loses transparency
                //Image image = Image.FromHbitmap(bmp.GetHbitmap());
                //image.Save("image.png");
            }
        }
    }

}


Note that the last 2 lines:

Image image = Image.FromHbitmap(bmp.GetHbitmap());
image.Save("image.png");
Are the wrong way.   This is the way you'll find if you Google for "How do I save a Graphic object to a file or stream".  Somehow, the GetHbitmap function manages to mangle the formatting out of the image.
Here are the resulting images from this code.
Bitmap.Save()

Image Save()

Monday, December 19, 2016

The item $/... does not exist at the specified version, or you do not have permission to access it.

Created some new views, and most of them worked OK, except one.

The item $/... does not exist at the specified version, or you do not have permission to access it.

Somehow the Team Foundation Server (TFS) thought the file already existed, even though I was trying to add it to source control for the first time.

How to solve.

  1. Copy and paste the text of the file to notepad
  2. Delete the file in Solution Explorer (this causes a check-out of the .csproj file)
  3. Check-in (this adds the "delete" to TFS).
  4. Now, in Solution Explorer, add the view (empty, without model)
  5. Note that there is now a [+] icon by the view in Solution Explorer
  6. Paste in the text from Notepad
  7. Save
  8. Right click the project (not just the added file) and check in. There should be 2 files in the changeset, the view and the .csproj.



Bryan Valencia is a contributing editor and founder of Visual Studio Journey.  He owns and operates Software Services, a web design and hosting company in Manteca, California.

Monday, December 5, 2016

Kernel Auto Boost Lock Acquisition With Raised IRQL

For me, this error was the direct result of my XiMeta NDAS driver software. Anytime my internet went out, Windows 10 would immediately bluescreen with the message:

Kernel Auto Boost Lock Acquisition With Raised IRQL

I uninstalled the NDAS driver, which was only required if the shared drive is plugged into the DSL router, not if the drive is plugged into the USB port.


Bryan Valencia is a contributing editor and founder of Visual Studio Journey.  He owns and operates Software Services, a web design and hosting company in Manteca, California.

Tuesday, August 23, 2016

Issuing Direct SQL from MVC5

Recently I needed to add a quick updater that added a value to Table1 when someone copied data from Table2.
Now, the normal way to do this with Entity Framework is to load the entity change the value, then save the changed entity.
But I am a SQL guy from way back, and rather than fetch the entire record and write it all back through Entity Framework, I figured it would be way more efficient if I just sent the database an update directly. Turns out that for us old SQL developers, it's terribly easy to do just that.
Here is my example subroutine, for your dining pleasure.
/// <summary>
/// Updates a Toolkit with the number of the Assignment ID Created from it.
/// </summary>
/// <param name="ToolkitID">The toolkit ID to be updated</param>
/// <param name="AssignmentID">The AssignmentID to attach</param>
public static void UpdateToolkitWithAssignmentID(int ToolkitID, int AssignmentID)
{
    using (ORM db = new ORM())
    {
        try
        {
            db.Database.ExecuteSqlCommand(
                "UPDATE [dbo].[ToolkitRequests] SET[AssignmentID] = @AID Where[UniqueId] = @ID",
                new SqlParameter("@AID", AssignmentID),
                new SqlParameter("@ID", ToolkitID)
                );
        }
        finally
        {
            db.Dispose();
        }
    }
}

That's it! It's super fast, and there is no mucking about in Entity Framework. NOTE that all the EF validity checking is skipped when you do this, so use it in cases where it's a simple SQL and you can ensure data integrity yourself. In my case, there is no way to get in this routine without valid values in both params, so I know I won't get surprised with a stray NULL.